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Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified | 9 Months Ended
--- | ---
Jun. 30, 2012 | Jun. 30, 2011
Operating Activities: |  |
Net income | $ 17,804 | $ 4,237
Adjustments to reconcile net income to net cash used in operating activities: |  |
Depreciation | 7,703 | 7,790
Amortization | 2,121 | 3,708
Stock-based compensation | 894 | 1,117
Bad debt expense | 509 | 82
Deferred income taxes | (273) | (5,440)
Gain on sale of investment |  | (1,229)
Changes in operating assets and liabilities: |  |
Accounts receivable | 2,071 | (14,151)
Costs and estimated earnings in excess of billings on uncompleted contracts | (35,423) | (4,862)
Inventories | (3,961) | (2,612)
Prepaid expenses and other current assets | 7,109 | 3,795
Accounts payable and income taxes payable | (1,257) | 7,462
Accrued liabilities | 490 | (10,910)
Billings in excess of costs and estimated earnings on uncompleted contracts | 8,880 | 33,511
Other | (208) | 2,743
Net cash provided by operating activities | 6,459 | 25,241
Investing Activities: |  |
Proceeds from sale of fixed assets | 158 | 308
Purchases of property, plant and equipment | (25,546) | (4,072)
Decrease in cash held in escrow | 1,000 | 0
Proceeds from sale of investment in joint venture |  | 1,229
Net cash used in investing activities | (24,388) | (2,535)
Financing Activities: |  |
Borrowings on Canadian revolving line of credit | 7,992 | 4,947
Payments on Canadian revolving line of credit | (7,992) | (4,955)
Payments on industrial development revenue bonds | (400) | (400)
Short-term and other financing | 1,822 | (250)
Net cash provided by (used in) financing activities | 1,422 | (658)
Net (decrease) increase in cash and cash equivalents | (16,507) | 22,048
Effect of exchange rate changes on cash and cash equivalents | (124) | (135)
Cash and cash equivalents at beginning of period | 123,466 | 115,353
Cash and cash equivalents at end of period | $ 106,835 | $ 137,266

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